Added igprof documentation
Added igprof documentation

Gangbiao/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,Moliholy/cvmfs,MicBrain/cvmfs,MicBrain/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,reneme/cvmfs,MicBrain/cvmfs,Moliholy/cvmfs,Gangbiao/cvmfs,MicBrain/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,reneme/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,reneme/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,alhowaidi/cvmfsNDN,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,MicBrain/cvmfs,Moliholy/cvmfs,djw8605/cvmfs,trshaffer/cvmfs